This test is not about the certificate – it’s about the TLS version and the crypto algorithms chosen. The configuration is based on recommendations from bettercrypto.org – a project dedicated to provide up-to-date copy & paste ready configurations for modern servers.

This server does not support SSL at all. It only supports TLS version 1.0 and later. It has a very strong sense of crypto and do not accept weak crypto algorithms. If your client can not connect, you have an old implementation.

Fork us on Github

All the tests, including keys and certificates, are available on Github.
https://github.com/edvinanet/tls-o-matic
That's also where you will find all the current tests while waiting for us to write documentation here.

What is TLS?

"The TLS protocol provides communications security
over the Internet. The protocol allows client/server applications to communicate in a way that is designed to prevent eavesdropping, tampering, or message forgery."
From RFC 5446 that defines the current TLS - version 1.2. Wikipedia is also a good help in explaining TLS.